Metastability of Discrete-Symmetry Flocks

ORAL

Abstract

In this talk, I will report a study on the stability of the ordered phase of flocking models with a scalar order parameter. Using both the active Ising model and a hydrodynamic description, I will show that droplets of particles moving in the direction opposite to that of the ordered phase nucleate and grow. This self-similar growth will be characterized analytically and I will demonstrate that droplets spread ballistically in all directions. These results imply that, in the thermodynamic limit, discrete-symmetry flocks -- and, by extension, continuous-symmetry flocks with rotational anisotropy -- are metastable in all dimensions.

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Publication: https://arxiv.org/abs/2306.01156

Presenters

  • Sunghan Ro

    • Massachusetts Institute of Technology

Authors

  • Sunghan Ro

    • Massachusetts Institute of Technology

  • Brieuc Benvegnen

    • Sorbonne Universite

  • Omer Granek

    • Technion - Israel Institute of Technolog

  • Ran Yaacoby

    • Technion

  • Hugues Chate

    • CEA-Saclay

  • Yariv Kafri

    • Technion

  • David Mukamel

    • Weizmann Institute of Science

  • Alexandre Solon

    • Sorbonne Universite

  • Julien Tailleur

    • Massachusetts Institute of Technology